Growth of Marinichlorella kaistiae KAS603 in bionic coral (a). Data are means ( ± SEM, n = 3-6 bionic coral prints). Dark and bright red areas show 95% confidence and prediction intervals, respectively. Vertical attenuation of fluence rate (E0 at 675 nm) at the beginning (day 1, means ± SEM, n = 4) and end of the performance test (day 12, means ± SEM, n = 3) (b). Net photosynthetic rates at day 5, 8, and 11 (means ± SEM, n = 3–10 corallites) (c). Lines represent curve fits (see Methods). Gross photosynthetic rates at day 5 (black) and day 8 (blue) (d). Symbols are means (±SEM, n = 2–6 corallites), lines are curve fits. Measurements were performed with O2 microsensors at the center of the corallite cup surface (closed symbols/solid lines) and at a vertical depth of 300 µm (open symbols/dashed lines).